Stereopticon.



F. SGHWANHKUSSER.

STEREOPTIGON. APPLICATION FILED SEPT.21,1911.

Patented Mar. 12, 1912.

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witwwae/a P. SGHWANHKUS SBR. STEREOPTIGON.

APPLICATION FILED SEPT. 21, 1911.

1,020,371 Patented Mar. 12, 1912.

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01 351 ,w (1 'r' may) COLUMBIA PLANOORAPH CO.. WASHINGTON, D. c.

UNITED STATES PATENT ()FFICE.

FREDERICK SCHWANHAUSSER, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO C. BESELER GO.

STEREOPTICON.

To all whom it may concern:

Be it known that I, FRnnnRIcK- Sci- WAN- i-riiussnn, a citizen of the United States of America, and a resident of Jersey City, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Stereopticons, of which the following is a specification.

This invention relates to stereopticons and is intended to provide an improved stereopticon which may be set up very quickly without much adjustment and which may also be conveniently arranged to fit within a packing-case.

For this purpose my invention consists of a stereopticon comprising a collecting-lens and frame for the picture to be thrown on the screen, a projecting-lens in line with the collecting-lens, a source of light permanently in line with both lenses, and adjustable means for supporting the source of light, said source of light, supporting-means and collecting-lens being arranged in line and adapted to be moved near each other so that the stereopticon may be placed in a packing-case for shipment, the supportingmeans of the projecting-lens and supporting-means of the source of light being of a length adapted to fit into a packing-case, and to control the correct position of the collecting-lens and source of light when the stereopticon is to be used.

In the accompanying drawings, Figure 1 is a side-view of my improved stereopticon showing the same ready for use with the collecting-lens, projecting-lens and source of light in one line, Fig. 2 shows the collectinglens and source of light arranged toward each other and ready for shipment, and Fig. 3 is a vertical, longitudinal section of Fig. 1 on an enlarged scale.

Similar letters of reference indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the case 10 which is adapted to receive the stereopticon when it is to be shipped, supports the stereopticon in Fig. 1 and incloses the stereopticon in Fig. 2.

As usual in stereopticons, my improved stereopticon is provided with collectinglenses 11, a picture-frame 12, projectinglens 13, and a collapsible portion 14 which enables the projecting-lens to be moved Specification of Letters Patent.

Application filed September 21, 1911.

Patented Mar. 12, 1912.

Serial No. 650,564.

relatively to the picture 12 and collectinglenses 11.

In the embodiment shown in the drawings the frame loinclosing the collecting-lens 11 is fixed at its bottom to a horizontal rod 16 which is supported by brackets 17 and 18. The barrel 19 of the projecting lens 13 is secured to an end-piece 20 which is movable along the rod 1.6 and which may be temporarily fixed in position by means of the thumb-screw 91. The source of light is shown in Fig. 3 in detail in which a Schwann lamp 25 is used which is surrounded by a horizontal casing 26 open at the inner end 27. Suitable resistances 28 are arranged in the holder 29 and are con nected with conductors 30 which lead to a source of electricity, but which electrical source is not explained in detail since it forms no part of this invention. The holder 29 is supported by a rod 31 which is vertically adjustable and adapted to be secured by a thumb-screw 32 supported by a holder 33 which in turn is horizontally adjustable on the rod 16 and adapted to be secured by means of a thumb-screw 34. The holder 33 is movable from the end of the rod 16 along the rod to the bracket 17. The support 20 is movable along the rod 16 from the end bracket 18 to the frame 15. With the parts shown in the position in Figs. 1 and 3, the holder 33 is at the end of the rod 16 and the support 20 is close to the bracket 18 and these positions correspond to the operative posit-ion of the stereopticon. \Vhen, however, it is desired that the stereopticon be shipped, the holder 33 is moved close to the bracket 17 and the holder 20 is moved inwardly away from the bracket 18 until the bellows 14 is collapsed and until the outer end of the barrel of the projecting-lens 13 is in line with the end of the rod 16. By this means, it is possible to place the entire stereopticon in a box and enable it to be readily shipped from place to place.

When it is again desired to use the stereopticon all that is necessary to do is to move the support 20 against the bracket 18 and the holder 33 outwardly to the end of the rod and the stereopticon is ready for use. To enable this to be accomplished my invention consists of an improved hood 35 which is provided with openings 36 at the upper end over which openings an auxiliary hood 37 is provided. The bottom of the hood is provided with an opening 38 to permit the inward movement of the rod 31 therein. The hood 35 has at one end 39 a diameter substantially that of the lenses 11, and at the other end it has a cylindrical part 40 of a diameter substantially that of the diameter of the cylindrical casing 26 which surrounds the source of light 25. Between these two ends 39 and 40, the hood 35 is in the shape of a truncated cone, or in other Words it tapers from the larger diameter to the smaller one. The function of this tapering hood is to have the axis of the smaller end coincident with the source of light while the axis of the larger end is coincident with the axis of the collectinglens 11 which is, as before stated, in line with the axis of the projecting-lens 13. As the axis of the free end of the hood 35 is in line with the axis of the collecting-lens 11 and the axis of the projecting-lens 13, it follows that as soon as the casing 26 is placed in the free end of the hood 35 the source of light will be in line with the axes of the lenses. Hence a device is provided which has a line passing through the axes of the lenses, also passing through a fixed point corresponding to the source of light. I have shown and described one form of my invention, but it is obvious that changes may be made in the construction without departing from the spirit of the same.

I claim:

1. In a stereopticon, a fixed collectinglens, a projecting-lens movable relatively thereto in line with the same, a hood having one end the same diameter as the col lectinglens and the other end of smaller diameter, a fixed guide-rod, and a source of light supported by said rod at the axis of the smaller end of the hood, the source of light and projecting-lens being movable along the guide-rod and in operative position when placed at the opposite ends of the same.

2. In a stereopticon, a fixed collectinglens, a projectingdens movable relatively thereto in line with the same, a hood having one end the same diameter as the collecting-lens and the other end of smaller diameter and having a slotted lower portion, and an auxiliary hood at the upper portion, a fixed guide-rod, and a source of light supported by said rod at the axis of the smaller end. of the hood, the source of light and project-inglens being movable along the guide-rod and in operative position when placed at the opposite ends of the same.

In testimony, that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing witnesses.

FREDERICK SCHWANHKUSSER \Vit-nesses L. J. MURPHY, JOHN MURTAGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

